Principal Systems Administrator

Electus Recruitment
Cheltenham, United Kingdom
2 days ago
£70,000 – £84,500 pa

Salary

£70,000 – £84,500 pa

Job Type
Permanent
Work Location
Hybrid
Seniority
Lead
Security Clearance
Required
Posted
2 Jun 2026 (2 days ago)

Benefits

Performance-related annual cash bonus Up to 8% employer pension contribution Comprehensive private medical and dental insurance Optional compressed working schedule (every other Friday off) 25 days annual holiday allowance Workplace nursery scheme Support for industry memberships Unlimited access to global online learning platforms
Principal Systems Administrator
Take ownership of core infrastructure design and technical guidance within a critical sector where your expertise ensures system resilience. This position allows you to drive advanced infrastructure projects and influence engineering practices while collaborating with senior management to deliver robust technical research. You will be able to shape complex architecture and guide technical teams in an environment that values structural stability and long term career progression.

Essential requirements
  • Proven background providing technical guidance and infrastructure administration at a senior level.
  • Sole British nationality is required due to the nature of the projects.
  • Eligibility to obtain and maintain UK Government security clearance.
  • Domain experience within the defence or high security infrastructure sector.

Your package
  • Performance related annual cash bonus scheme.
  • Up to 8% employer pension contribution via salary exchange.
  • Comprehensive private medical and dental insurance coverage.

The work
  • Act as the systems administration lead on advanced projects and major programmes.
  • Install, configure, administer and troubleshoot complex infrastructure and application deployments.
  • Apply subject matter expertise to provide technical recommendations to management and guide team members.
  • Participate in a technical roster to support the delivery of resilient services and manage planned infrastructure changes.
  • Maintain and disseminate approved operational procedures aligned with industry security standards.

Skills and background
  • Comprehensive knowledge of VMware vSphere 8.0 or above alongside Fibre Channel storage technologies.
  • Strong capabilities with Microsoft OS 2019 and 2022, Exchange, Office 365 and Active Directory Federated trusts.
  • Experience with Citrix XenApp, XenDesktop and Citrix Netscaler.
  • Technical capability with cloud environments such as Amazon Web Services or Azure.
  • Practical knowledge of Linux environments and Ansible automation tools.
  • Familiarity with SQL Server administration and project frameworks including ITIL, Agile or Scrum.

Benefits and balance
  • Here is how this employer helps you thrive:
  • Optional compressed working schedule providing every other Friday off.
  • Twenty five days annual holiday allowance with the option to buy or sell leave.
  • Workplace nursery scheme with a monthly employer contribution.
  • Support for industry memberships alongside unlimited access to global online learning platforms.

Location and setup
  • This position is based in Cheltenham and operates on a hybrid working pattern.
  • The role requires travel within the United Kingdom up to 25% of the time, with occasional international travel to regional offices.


Share your profile to arrange a short confidential call this week.

You will be represented by a specialist technical recruiter who will guide you through each stage of the process.

Due to the nature of work at our client’s site, these vacancies are only open to British Citizens who hold SC clearance or can obtain it.

This is a permanent role.

Electus Recruitment Solutions provides specialist engineering and technical recruitment solutions to high technology industries. Thank you for your interest. If you do not hear from us within seven working days, please presume your application has been unsuccessful on this occasion. You may resubmit your CV or details in the future, and we shall assess your suitability then.

Related Jobs

View all jobs

Principal Oracle Business Systems Analyst (Order Management & Pricing)

Entrust London, United Kingdom

Principal Oracle Business Systems Analyst (Order Management & Pricing)

Entrust Cambridge, United Kingdom

Principal Oracle Business Systems Analyst (Order Management & Pricing)

Entrust United States

Principal Windows Infrastructure Platform Engineer

Franklin Bates Se10Aa, SE1 0AA, United Kingdom
£50,000 – £55,000 pa Hybrid

Principal Cloud DevOps Engineer

Entrust London, United Kingdom
Hybrid

Principal Network Security Engineer

Entrust Newbury, United Kingdom

Industry Insights

Discover insightful articles, industry insights, expert tips, and curated resources.

Where to Advertise Cyber Security Jobs in the UK (2026 Guide)

Where to advertise cyber security jobs UK in 2026: the specialist boards, communities and channels that reach offensive, defensive and GRC security talent. The candidate pool is small, heavily vetted and in high demand across government, financial services, critical national infrastructure and the private sector simultaneously. Many of the strongest candidates hold active security clearances, are not actively job-searching through general platforms, and move primarily through specialist networks and trusted referrals. General job boards reach a broad audience but lack the specificity that security professionals expect. Specialist platforms, government-affiliated channels and cleared candidate networks each serve a different part of the market. This guide, published by CybersecurityJobs.tech, covers where to advertise cyber security roles in the UK in 2026, how the main platforms compare, what employers should expect to pay, and what the data says about hiring across different role types.

Cyber Security Jobs UK 2026: What to Expect Over the Next 3 Years

Cyber Security Jobs UK 2026: roles, salaries and the threat intelligence, cloud security and zero-trust hiring trends shaping UK cyber careers. Cyber security is one of the few sectors where demand for talent has never once dipped. Every major technological shift of the past decade — cloud migration, remote working, AI adoption, the proliferation of connected devices — has expanded the attack surface that security professionals are expected to defend. And every expansion of that attack surface has generated more jobs. But the cyber security jobs market of 2026 is not simply a larger version of what it was three years ago. It is a structurally different market. The threats have evolved, the technologies used to combat them have changed, the regulatory environment has tightened considerably, and the roles being created reflect all of that. A job seeker who understands only the cyber security landscape of 2023 is already working with an outdated map. The candidates who will thrive over the next three years are those who understand where the sector is heading — which specialisms are attracting the most investment, which technologies are reshaping defensive and offensive security practice, and how the definition of a cyber security professional is broadening well beyond the traditional image of a network defender in a SOC. This article breaks down what the UK cyber security jobs market is likely to look like through to 2028 — covering the titles emerging right now, the technologies driving employer demand, the skills that will matter most, and how to position your career ahead of the curve.